(Adopted 06-19-79; Revised 04-21-81, 09-25-90, 11-03-94, 06-08-95)


101 PURPOSE: To limit the emission of volatile organic compounds from degreasers.




201 CONVEYORIZED DEGREASER: Any continually loaded, conveyorized degreaser, using solvent that is maintained either above or below the initial boiling point temperature of the solvent.

202 DEGREASER: A container that contains solvent or into which solvent is sprayed and concurrently drained, used to remove oil, grease, soil, coating, dirt or other undesirable matter from workloads.

203 EXEMPT COMPOUNDS: The following compounds are exempt from the definition of VOC in Section 217:


205 FREEBOARD RATIO: The freeboard height divided by the smaller of the inside length or the inside width of the degreaser's evaporative surface area.

206 LEAK: Three or more drops of liquid solvent per minute.

207 LIP EXHAUST: A system which collects solvent vapors escaping from the top of a degreaser and directs them away from operating personnel.

208 LOW VOLATILITY SOLVENT: Any solvent with an initial boiling point which is greater than 248oF (120oC) and with a temperature as used, at least 100oC (180oF) below the initial boiling point as determined pursuant to Section 502.1.

209 MAKEUP SOLVENT: The solvent added to the degreaser to replace solvent lost through evaporation or other means.

210 NON-VAPOR DEGREASER: Any degreaser using solvent which, if heated, is maintained below the initial boiling point temperature of the solvent.

211 OPEN-TOP VAPOR DEGREASER: Any batch-loaded degreaser using solvent which is maintained above the initial boiling point temperature of the solvent. Degreasing occurs through the condensation of the resultant solvent vapor onto the surface of the workload.

212 OSHA: Occupational Safety and Health Administration.

213 REFRIGERATED FREEBOARD CHILLER: A secondary cooling coil mounted above the primary condenser which provides a chilled air blanket above the solvent vapor-air interface to cause the condensation of additional solvent vapor, thereby increasing vapor control efficiency.

214 REMOTE RESERVOIR DEGREASER: A non-vapor degreaser with a tank which is completely enclosed except for a solvent return opening no larger than 15.50 square inches (100 square centimeters) which allows used solvent to drain into it from a separate solvent sink or work area and which is not accessible for soaking workloads.

215 SOLVENT: VOC-containing compounds which are used as diluents, thinners, dissolvers, viscosity reducers, or cleaning agents.

216 STATIONARY SOURCE (SOURCE OR FACILITY): Any building, structure, facility, or emissions unit which emits or may emit any affected pollutant directly or as fugitive emissions.

217 VOLATILE ORGANIC COMPOUNDS (VOC): Compounds containing at least one atom of carbon, except for the compounds listed in Section 203.

218 VOLATILE SOLVENT: Any solvent which is not defined as a low volatility solvent pursuant to Section 208.

219 WIPE CLEANING: That method of cleaning which utilizes a material such as a rag wetted with a solvent, coupled with a physical rubbing process to remove contaminants from surfaces.

220 WORKLOAD: The objects put in a degreaser for the purpose of removing oil, grease, soil, coating, dirt or other undesirable matter from the surface of the objects.


301 GENERAL EQUIPMENT REQUIREMENTS: Any person who uses a degreaser shall utilize the following equipment:

302 NON-VAPOR DEGREASERS; EQUIPMENT REQUIREMENTS: A person shall operate non-vapor degreasers, including remote reservoirs (except as noted in Section 102.2), using one of the following control devices:


303 VAPOR DEGREASERS; EQUIPMENT REQUIREMENTS: A person shall operate vapor degreasers using all of the following control devices:


304 VAPOR DEGREASERS; SAFETY SWITCHES: If a vapor degreaser is used, then the following equipment shall be utilized:


305 CONVEYORIZED DEGREASERS: In addition to the requirements of Sections 301.2, and 301.3, a person shall not operate a conveyorized degreaser unless it is equipped with the following control devices:


306 GENERAL OPERATING REQUIREMENTS: Any person who uses a degreaser must conform to the following operating requirements:

307 LIP EXHAUST: Effective November 3, 1995, a lip exhaust system shall not be added to any degreaser, unless it is vented to an emission control system, pursuant to Section 308. The lip exhaust shall be turned off when the degreaser is covered.

308 ALTERNATE EMISSION CONTROL SYSTEM REQUIREMENTS: Any person or stationary source subject to this rule may use an emissions control system as an alternative to Sections 302, or 303.1 and 303.2, provided that the system has an overall control efficiency (the collection efficiency multiplied by the control efficiency) of at least 85 percent on a mass basis, as determined pursuant to Sections 502.2, and 502.3. The emission collection system shall have a ventilation rate not greater than 20 cubic meters per minute per square meter over the total area of the degreaser's evaporative surface area, unless the rate must be changed to meet Federal and State OSHA requirements. The system must be approved in writing by the Air Pollution Control Officer.


401 COMPLIANCE SCHEDULE: Any person or stationary source subject to this rule, including previously exempt sources, shall be in compliance with this rule by November 3, 1995.

402 CALCULATION FOR DETERMINATION OF VOC CONTENT PER VOLUME OF SOLVENT: The volume of solvent is defined as the volume of the original solvent, plus any VOC-containing material added to the original solvent. The weight of VOC per volume of solvent shall be calculated by the following equation:

403 OPERATION AND MAINTENANCE PLAN: Any person using an approved emission control device pursuant to Section 308, as a means of complying with this rule, as provided in Sections 303, or 303.1 and 303.2, must submit, with the application for Authority to Construct, pursuant to Rule 501, GENERAL PERMIT REQUIREMENTS, an Operation and Maintenance Plan for the emission control device to the Air Pollution Control Officer for approval. Plans for emission control devices installed as of November 3, 1994, if not previously submitted, must be submitted by August 3, 1995, and receive approval of the Air Pollution Control Officer. The Plan shall specify operation and maintenance procedures which will demonstrate continuous operation of the emission control device during periods of emissions-producing operations. The Plan shall also specify which records must be kept to document these operation and maintenance procedures. These records shall comply with the requirements of Sections 501.2, and 501.3. The Plan shall be implemented upon approval of the Air Pollution Control Officer.


501 USAGE RECORDS: In addition to any existing permit conditions issued pursuant to Rule 501, effective November 3, 1995, any person subject to this rule shall comply with the following requirements: